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Carmex Thread Turning External Insert - API 382 - Right Hand - 27ER4API382K20
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | API 382 |
| Pitch | 4 |
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The ones our customers buy most.Description
Carmex Thread Turning External Insert API 382 — Right Hand — 27ER4API382K20 is a precision threading insert designed to simplify external thread turning. Built for a wide range of users—from engineers and buyers to shop floor technicians and hobbyists—it delivers dependable, consistent thread profiles with minimal setup.
This high‑quality laydown triangular insert is crafted to handle the majority of thread standards in use today, enabling you to tackle both simple and more demanding threading tasks with a single tool. Its straightforward geometry supports easy installation and predictable performance across diverse applications.
- Broad thread-standards compatibility: One insert covers most major thread standards, reducing the need to stock multiple tools and simplifying tool-change planning.
- Laydown triangular geometry for stable cutting: The triangular laydown design promotes firm engagement and smooth chip flow for consistent, clean thread finishes.
- Trusted manufacturing quality: Engineered for dependable performance in demanding environments, helping to minimize downtime and rework with reliable results.
In practice, this insert streamlines your threading workflows by combining versatility with consistent results. It supports quick setups, stable cutting, and long service life, enabling you to complete more parts per shift while maintaining thread accuracy and surface finish quality.
Part Numbers
- Protool Part Number
- 27ER4API382K20
- Brand
- Carmex
- Category
- Thread Turning
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.


